Gin 框架的简单搭建

一、GIN概述

官方：Gin 是一个用 Go (Golang) 编写的 web 框架。 它是一个类似于 martini 但拥有更好性能的 API 框架，由于 httprouter，速度提高了近 40 倍

框架文档

二、Gin框架搭建

1. 创建你的项目根目录并进入，如为 go-gin-demo

2. 执行命令安装 gin

   go get -u github.com/gin-gonic/gin

3. 拷贝一个初始模板到你的项目里

   curl https://raw.githubusercontent.com/gin-gonic/examples/master/basic/main.go > main.go

4. go run main.go报错 模块找不到

   main.go:6:2: cannot find module providing package github.com/gin-gonic/gin: working directory is not part of a module

5. 执行连个命令修正
   go-gin-demo 貌似可以随意取个人喜欢和项目名一样
   或者可以改成类似github.com/gin-gonic/gin 的路径

   go mod init go-gin-demo  
   go mod edit -require github.com/gin-gonic/gin@latest

6. 执行 go run main.go 正常启动 默认8080 如果占用需要改为其他端口本人9090

   [GIN-debug] [WARNING] Creating an Engine instance with the Logger and Recovery middleware already attached.
   [GIN-debug] [WARNING] Running in "debug" mode. Switch to "release" mode in production.
   - using env:   export GIN_MODE=release
   - using code:  gin.SetMode(gin.ReleaseMode)
   [GIN-debug] GET    /ping                     --> main.setupRouter.func1 (3 handlers)
   [GIN-debug] GET    /user/:name               --> main.setupRouter.func2 (3 handlers)
   [GIN-debug] POST   /admin                    --> main.setupRouter.func3 (4 handlers)
   [GIN-debug] [WARNING] You trusted all proxies, this is NOT safe. We recommend you to set a value.
   Please check https://pkg.go.dev/github.com/gin-gonic/gin#readme-don-t-trust-all-proxies for details.
   [GIN-debug] Listening and serving HTTP on :9090

7. 测试响应，新建一个窗口

   curl 127.0.0.1:9090/ping     #响应  pong
   curl 127.0.0.1:9090/user/:peter  #响应 {"status":"no value","user":":peter"}

   至此，Gin 框架已经搭建好了！

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